Combined knob latch and lock



Sept. 22, 1925.

JNVENTOR. Y W. Brown BY I ATTORNEY.

1,554,839 w. BROWN COMBINED KNOB LATCH AND LOCK Patented Sept. 22, 1925.

UNITED s r WILL A nown, on

rattan snnmnan', WYO ING.

COMBINED KNOB LATCH AND LOCK.

Application filed. November 22,1923: aerial No. 676,365.

To all whom it may concern.

Be it known that 1, WILLIAM BROWN, a citizen of the United States, residing at Sheridan, in the county of Sheridan and State of lVyoming, have invented certain new and useful Improvements in Combined Knob Latches and Locks, of which the following is a specification.

This invention relates to door locks, more particularly to mortice door locks, and has for one of its objects to improve the con struction and to increase the efficiency and utility of devices of this character.

lVith this and other objects in view the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claim, and in the drawings illustrative of the preferred embodiment of the invention.

Figure 1 is a side elevation of the improved device partly in section, with the casing cover detached, and the body of the door in which it is installed also in section.

Figure 2 is a plan view, detached, of the locking bolt portion of the device.

The improved device comprises an enclosing casing or shell represented as a whole at 10 and provided with a face member 11, when arranged as a mortice lock, and embedded in the door, a portion of which is represented at 12,'in the usual manner.

The casing 10 is provided with the ,usual detachable closure plate, not shown, and secured by the usual clamp screw fitting in a threaded socket 13 of the usual construc tion.

Attached to the rear wall of the casing 10 is a bolt guide 1 1, and slidable in the guide and adapted to extend through openings in the outer face of the casing and through the face plate 11, is a locking bolt 15, the latter having the usual inclined keeper engaging face 16, and with sockets or slots 17 in its upper and lower faces, as shown.

The inner end of the bolt is likewise longitudinally slotted as shown at 18 in Figure 2 with a stop pin 19 transversely of the slot. A stop pin 20 is also extended through the body 15 of the bolt, to limit the outward movement of the bolt.

A knob tumbler 21 is mounted in the easing and slotted to engage the pin 19, to actuate the lock bolt, a spring 22 being arranged to maintain the bolt 15 yieldably in projected position with the stop pin 20 engaging in the adjacent end of the casing, as shown.

Attached to the back portion of the casing 10 is a guide member 23, and movably en'- gaging the guide member is a tumbler member 24, the latter adapted to engage in the socket 170i the lock bolt which for the time being is presented to the path of the tumbler.

The bolt 15, as before stated, is reversible to enable the lock to be arranged upon a door opening in either direction. 1

The tumbler 25% is provided with spaced sockets indicated at 25 and 26, and attached at 27 to the casing is a resilient arm 28 having a stop pin 29 adapted to alternately and yieldably engage the sockets 25 and 26. A relatively light spring 30 is arranged to bear upon the tumbler 24, and operative to move it within its guide device 23, when a sufficient force is employed to overcome the resistance of the resilient arm 28. By this means the tumbler 24 may be yieldably maintained in either of two positions, or with its lower end within the adjacent socket 17 to lock the bolt 15 in its outer position and engaged with the keeper of the door casing, or with the tumbler elevated free from the locking bolt as shown in Figure 1.

Mounted in the casing 10 is a lock device indicated conventionally at 81, and in cluding an arm 32 having a slot 33 engag ing a pin 34. in the tumbler 24-.

The sockets 25 and26 are rounded or the like, so that the pin 29 will hold the tumbler against accidental displacement, and against the resistance of the spring 30, but which will yield to the force employed to actuate the arm 32 of the lock device 31.

By this arrangement if the improved de vice is to be employed as an ordinary knob latch, the tumbler 2 1 is disposed in its disengaged position, as shown in Figure 1. If the device is to be employed as a combined knob latch and knob lock, the lock member 81 is actuated to force the tumbler 24 into its extended; position in engagement with the adjacent socket 17 of the lock bolt and against the resistance of the spring 28 and its pin 29 to dispose the socket 25 into engagement with pin 29.

The ends of the sockets 17 being at right angles to the longitudinal axis of the lock bolt, and the adjacent end of the tumbler being square, the lock bolt is effectually held from all longitudinal movement, and no force applied to the lock bolt Will cause longitudinal movement of the tumbler.

The lock bolt cannot be released unless the tumbler is moved by operating the lock device indicated at 31. 1

The improved device can be constructed of any size or of any suitable material or combination of materials, and either mortice or rim look as may be required, but as before stated, is more particularly adapted to mortice locks.

The preferred embodiment of the invention is disclosed in the drawings and set forth in the specification, but it will be understood that modifications Within the scope of the claimed invention may be made in the construction Without departing from the principle of the invention or sacrificing any of its advantages. I

Having thus described the invention, what is claimed asnew is:

A device of the "class described comprising 'a'supporting casing, a bolt slidable in said casing and having atransverse Socket,

spaced guide ribs W1th1n said casing and definin a 'uldevva at ri ht an 'les to the path of said bolt, one of said gu1de llbS havln a. transverse uide a erture a tumbler member movable between said guide ribs and engageable in the socket of said bolt When in one position and provided With spaced sockets adapted to alternately register With the aperture of the guide rib when the tumbler is disposed in either one of its two positions, a stop .pi-n movable through the aperture of the guide rib and alternate- 1y engageable with the sockets of the tum- VILLIAM BROWN. 

